题解 | #阶乘#

用python有点耍赖，不过思路差不多

from math import factorial
while True:
    try:
        n = int(input())
        m = p = n
        if n % 2 == 0: m -= 1
        if n % 2 == 1: p -= 1
        print(sum(factorial(i) for i in range(1, m+1, 2)), sum(factorial(i) for i in range(2, p+1, 2)))
    except:
        break